Master DH 731 Notice Technique page 22

• Make sure the air inlet and outlet are not obstructed.
THE UNIT SEEMS TO DO NOTHING:
• Is the filter dusty, contaminated ?
• Is the air intake or outlet blocked up?
• Is the room humidity already quite low?
THE UNIT SEEMS TO DO LITTLE:
• Are too many windows or doors open?
• Is there something in the room producing lots of humidity?
THE UNIT IS TOO NOISY:
• Check whether the unit is sitting on a level surface.
THE UNIT IS LEAKING:
• Make sure the unit is in good shape.
• If you are not using continuous drainage, make sure the
rubber plug (at the bottom of the unit) is in its position.